Area Forecast Discussion
Issued by NWS Boise, ID

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FXUS65 KBOI 280924
AFDBOI

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE ID
324 AM MDT TUE JUL 28 2015

.SHORT TERM...TODAY THROUGH WEDNESDAY...NORTHWEST FLOW WILL WEAKEN
AND GRADUALLY BACK TO WEST THROUGH WEDNESDAY IN RESPONSE TO A
BUILDING UPPER LEVEL RIDGE OVER THE WESTERN U.S. CONDITIONS
REMAIN DRY ENOUGH THAT NO CLOUD COVER IS EXPECTED DURING THE
PERIOD. THE HEAT WILL BE SLOW TO BUILD WITH TEMPERATURES STILL
10-15 DEGREES BELOW NORMAL TODAY. AFTER ANOTHER COOL NIGHT
TEMPERATURES WARM TO WITHIN A FEW DEGREES OF NORMAL ON WEDNESDAY.
MUCH LIGHTER NORTHWEST WINDS TODAY AS THE FLOW ALOFT WEAKENS.

.LONG TERM...WEDNESDAY NIGHT THROUGH MONDAY...DRY AND WARM
CONDITIONS OVER THE REGION THROUGH THE END OF THE WEEK AS HIGH
PRESSURE CONTINUES TO BUILD OVER THE FOUR CORNERS REGION.
TEMPERATURES WILL WARM THROUGH THE END OF THE WEEK WITH HIGH
TEMPERATURES BY FRIDAY AVERAGING 6-8 DEGREES ABOVE NORMAL.  FOR
THE WEEKEND AND INTO EARLY NEXT WEEK MODELS REMAIN IN RELATIVELY
GOOD AGREEMENT WITH THE RIDGE FLATTENING OVER THE PACIFIC NORTHWEST
AS WEAK SHORTWAVE TROUGHS MOVE EAST OVER SOUTHERN CANADA.  MODELS
CONTINUE TO DIFFER ON THE HANDLING OF MONSOON MOISTURE AS IT MOVES
NORTH THROUGH CALIFORNIA ON THE WEST SIDE OF THE HIGH PRESSURE OVER
THE FOUR CORNERS REGION.  GFS REMAINS PROGRESSIVE IN BRINING
MOISTURE TO AT LEAST OREGON BY SATURDAY NIGHT BUT LATEST MODEL RUN
OF THE GFS HAS SLOWED DOWN THE NORTHWARD PROGRESSION OF THE MONSOON
MOISTURE.  CURRENT RUN OF THE ECMWF DOES NOT SHOW ANY MONSOON
MOISTURE UNTIL SUNDAY NIGHT WITH MOST OF THE MOISTURE OVER IDAHO.
WITH UNCERTAINTY ON WHERE THE MONSOON MOISTURE WILL END UP OVER THE
WEEKEND WILL KEEP THE TREND OF AT LEAST A MENTION OF ISOLATED
AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS THROUGH THE WEEKEND
AND INTO EARLY NEXT WEEK.  HIGH TEMPERATURES WILL BE 6-8 DEGREES
ABOVE NORMAL SATURDAY COOLING TO A FEW DEGREES ABOVE NORMAL SUNDAY
AND MONDAY.

&&

.AVIATION...VFR UNDER MOSTLY CLEAR SKIES.  WITH THE RECENT RAIN
AND COOLER TEMPERATURES CAN NOT RULE OUT ISOLATED MOUNTAIN VALLEY
FOG THROUGH 16Z.  SURFACE WINDS GENERALLY 10 KNOTS OR LESS.  WINDS
ALOFT NORTHWESTERLY 10 TO 20 KTS UP THROUGH 10K FT MSL.

&&

.BOI WATCHES/WARNINGS/ADVISORIES...
ID...NONE.
OR...NONE.

&&

$$

WEATHER.GOV/BOISE

SHORT TERM...DG
LONG TERM....JA
AVIATION.....JA


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